Recording device



H- C. HAYES AND G. W. LEWIS.

RECORDING DEVICE.

APPLICATION FILED APR. 13. 1916.

Patented Mar. 23, 1920.

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RECORDING DEVICE APPLICATION man APR. 13, 1915.

Patented Mar. 23,1920.

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Patented Mar. 23, 1920.

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H. C. HAYES AND 6.. W. LEWIS.

RECORDING DEVICE.

APPLICATION mu) APR. 13. l9l6.

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RECORDING DEVICE.

APPLICATION mm APR. 13, 19-16.

' Patented Mar. 23, 1920.

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HARVEY C. HAYES AND GEORGE W. LEWIS, OF SWARTHMORE, PENNSYLVANIA,

ASSIGNORS TO THE TINIUS OLSEN TESTING MACHINE COMPANY, OF PHILA- DELPHIA, PENNSYLVANIA, A CORPORATION 01 PENNSYLVANIA.

RECORDING DEVICE.

To all whom it may concern:

Be it known that we, HARVEY C. HAYES and GEORGE W. LEWIS, citizens of the United .s making a record of the variation of the V15- cosity of liquids under different temperature conditions, the arrangement of parts being such that the record may be secured in the form of a curve or series of points defining a line which shall graphically illustrate such variation. I We further; desire to provide a machine by which viscosity tests may be quickly and conveniently made. under substantially uniform speed conditions and at the same or at different temperatures.

These objects and other advantageous ends we secure as hereinafter set forth, reference being had to theaccompanying drawings, in which,

Figure 1 is an elevation illustrating the preferred form of our apparatus;

Fig. 2 is a vertical section on the line (0-0, Fig. '1;

Fig. 3 is an elevation partly in section of one form, of the thermometric mechanism forming part of our invention, together with the recording mechanism associated therewith;

Fig. 4; is a plan of the apparatus shown in Fig. 3;

Fig. 5 is a vertical section on the line 5 6, Fig. l;

Fig. 6 is a detached perspective View of that form of thermometric mechanism illustrated in Figs. 1 to 5;

Fig. 7 is a plan of a record madeby our machine; and l i 4 Figs'S, and9 are elevations, partly in section, illustrating modified forms of thermometric mechanism which may be employed as part of our invention.

In the above drawings 1 represents a supporting bas'e having a vertically projecting standard 2 terminating inan overhanging arm 3. Also carried by said base are end thereof,

Specification of Letters Patent. Patented luar, 23, 1920, Application filed April 13, 1916. Serial No. 90,934.

brackets l and 5 of which the latter is designed to support a small electric motor 6, i

to Whose shaft is fixed a worm 7 meshing with a worm Wheel 8 fixed to a vertical tubular spindle 9. Said motor shaft terminates in a copper or other suitable metal disk 10 mounted immediately adjacent a magnet -11 carried by a shaft 12 supported in bearings provided by a supplementary bracket 13 projecting from the bracket 4.. Fixed to one of said bearings is a suitably graduated disk 14 mounted concentrically with the shaft 12 which has fixedto its outer extremity a pointer 15 operative immedidisk.

Rigidly supported on the main standard 2 is a container 16 having in its bottom "an opening for the'passage of the vertical spindle 9 and provided with a stuffing box 17 extended downwardly around said spindle. The lower end of the latter extends through a bearing provided by a projection 18 from the standard 2 and terminates in a cock or valve 19 whereby flow of liquid from ,a cup 20 fixed to its upper end, may be permitted or cut off at will. -A pan 21 may be mounted on the base 1 under this cock to receive any liquid discharged therefrom.

passes a suspendin member, such as a wire or other filament 2 whose lower end is connected to the member 22 adjacent the lower vy hile its upper end is hung from the arm 3 preferably by the means shown in Fig. 2. For this pur ose the outer end of said arm has threaded into it a bush ing 28, which may be clamped in any adjusted position by a thumb screw 29 and which carries a suspension screw 30 engaging the wire or torsion element 27.

The member 22 also has fixed to its upper end a second tube 31 concentric with the tube 23 and passing loosely through the cover 32 of the cup 20, there being a cap 33- on-its upper end whereby it isfiinaintamed properly spaced from or centered relatively to said tube 23. Fixed concentrically to this outer-tube 31 is a drum-34 on which a record-receiving sheet or card, such as that indicated at a: in Fig. 7, may be mounted by any suitable means'such as the spring strips 35.

The preferred form of thermometric device used as part of our invention, is illustrated as consisting of "a bracket 36 so m pted on the side of the container 16 ,as to a low of its being raised or lowered as a whole at will, for which purpose it has a vertical slot through which passes a set screw 37 carrying a clamping nut 38. The

bracket 36 overhangs the open top ofthe container 16 and has depending from it into the latter a bar 40 0f some material such as invar whose coeiiicient of expansion is practically zero. The lower end of said bar is extended at right angles and has rigidly fixedto it the lower end of a vertically extending bar 41 of some material, such as zinc,-which preferably has a comparatively high coefficient of expansion. This latter bar, whose length is preferably slightly less than that of the supporting bar 40 terminates in a rod-like extension 42 slidably guided through an opening 43 in the top portion 44 of said supporting bar and carthe three heads 49'4549 is a yoke con whose lower end is rigidly sisting of a cross piece50 having a paimof knife edges 5151, respectively 0 erative in notches 52 in the heads 49, whi e through the center of said piece we extend a rod 53 carrying at one end a knife edge 54 operai tive in notches 55 of the head 45 and at its opposite end having mounted on it a\loose collar 56, having a spring 57 between it and the cross piece 50. Between' the heads 4949 and the head 45 is mounted a intle 58 having a central knife edge 59 designed to engage a notch 60 in the head 45 and also provided with two other knife ed 61 on either side of and extending opposltely to said central edge, designed to respectivelyenter notches 62 in"the heads 49. This-pintle hasin its ends conical recesses for the reception oftrunnion'screws 63 whereby it .is rotatably supported on the bracket 36 and it has projecting from its opposite ends two arms 64 and .65, of which the first, is prolonged as shown in Fig. 3.

second link 68. links 66 and 68 are pivotally connected toa stylus-carrying arm 69, the first adjacent vary in length under these conditions.

The bracket 36 at its upper end has a pro .jecting arm 36 to whose extremity is pivoted an upwardly extending link 66, and it also 'has adjacent its inner end, a vertical standard 67 to whose upper end is pivoted The free ends of both the one end thereof and the other at a point near its middle, while a third link 70 extends'between the end of the arm 64 and said stylus arm,'to both of which it is ivotally connected. Said arm 69 at its ree end carries a pencil or stylus 71 which, by reason 1 of the supporting structure above described, is forced to move under the action of the arm 64 in a straight line, which in the present instance, is parallel with the axis of rotation of the drum 34.

With the above described arrangement of parts, the liquid whose viscosity it is desired to test is introduced into the cup 20, preferably in such quantity as to completely submerge the independently rotatable member 22. At the same time a liquid such as oil, whose temperature may be varied or kept constant at will, is laced in the container 16,-in amount su cient to surround but not cover the cup 20. A properly graduated record sheet a: is then placed on the drum 34 and the motor 6 is put in operation so as to drive the spindle 9 and cup 20 at a definite and substantially constant speed. The disk 10 therefore tends to rotate the bar magnet 11, exerting upon it a certain torsion which is opposed by the spring 12. As a consequence, when the motor is making a certain number of revolutions per mmute, the pointer is turned through a definite angle which-may be noted by observing its position relatively to the graduations on the disk 14. Obviously the rotation of the cup 20 and of the liquid therein exerts a turning force upon the'member 22,

which, other things being equal, is directly dependent upon the viscosity of'said liquid,

the member 22 and hence the drum 34 being turned through a definite angle against the resistance/to such torsion offered by the suspension wire or filament 27.

Obviously therefore, when the cup is turned by the motor at a certain speed, the drum is rotated'from its normal or zero position, through an angle depending u on the viscosity of the liquid under test. his liquid is maintained at a temperature determined by that of the liquid in the container 16, and since this latter is in contact with the .thermometric apparatus, the expansion of the bar 41 due to this temperature, moves upward the head 45, since the supporting member 40 does not appreciably The expansion of the bar 46, through the side rods 48, moves the heads 49 downwardly and they, withthe head 45, turn the pintle 58 axially through an angle proportional to the temperature of the liquid in the con-' tainer 16 and therefore of that in the/cup 20. It now the stylus be brought into or maintained in engagement with the recordsheet on the drum 34, a mark is made Whose distance from a vertical line at one end of the sheet is dependent upon theviscosity of the liquid, and whose distance from the hori zontal line at the bottom of said sheet is de- Again, as shown in Fig. 9, we may mount on a bar 850i invai or other equivalent material an arm 86 pivoted thereto'at 87 adjacent the lower end thereof. The upper end of this arm, which is also of inv'ar, is provided witha toothed rack 83 engaging the teeth of a pinion 84 fixed as before to the arm 64 and in this case said arm at a suitable point on one side has a notch or projection.v I

86 engaged by one end of a zinc or other bar 88 whose opposite end is pivoted at 89 to the supporting structure 85. these cases the expansion of the zinc rod 81 or 88 causes the oscillation of the arm 82 or 86, as the case may be, and a consequent angular movement of the arm 64 to an amount ependent upon the elongation and hence the temperature, of said zinc bars and of the fluid in which they are immersed.

We 'claim pendent on the temperature of said liquid. N The combination with viscosity test- Such a point is indicated at y in Fig. -7 and if by any convenient means, such as a gas burner, the temperature of the liquid in the container 18 israised .while the speed of the motor is maintained constant, the viscosity of the liquid in the cup 20 is diminished in the case illustrated, so that the member 22 and hence the drum 34 are allowed to turn under the action of the wire 27 toward their normal or zero positions. As this turning occurs, the stylus'will make a line "on the record sheet, or if it be not main tained in contact with said sheet, it may be caused to make another mark thereon such as that indicated at y. By continuing the gradual heating of the liquid in the container 16, other marks slfch as 3 3 and 3 may be made, which when connected by a line so drawn as to pass through all of them, will graphically illustrate thevariation oi the viscosity of the liquid in the cup 20 with the temperature of said liquid ;-it being obvious that each variation of such tempera ture, through the bars 41 and 48, alters the angle of. deflection of the pintle 58 and thereby varies the vertical distance of the stylus 7 1' iromxthe bottom of the record sheet.

lit is obvious that other forms of thermometric apparatus may be employed to' actulower end of this bracket we fulcrum a lever 82 having a short arm engaged by the tree end of the rod 81, while the extremity of its upwardly extending long arm isprovided with a toothed rack-83 meshing with a gear 84 fixed to or serving as the pivot of the arm 64, which as in the case illustrated in l is connected to the stylus lever 69 by a link 70,

. under test; of a second member whose position varies with thetemperature of such liquld; and a single instrument operatively associated with said members for simultaneously recording their defl-ectibns. The combinationwith a viscosity testing machine having a member whose position varies with the viscosity of the liquid undertest; of a second member whose position varies with the temperature of such liquid; and means, operatively associated with said members for making a single record of the viscosity corresponding to any temperature of said liquid.

3. The combination of a viscosimeter; a temperature responsive instrument; and means operatively dependent upon both of said instruments for simultaneously record ing their indications.

4. The combination of a viscosimeter; a

temperature responsive instrument: and means for making a joint record of the indications in a single record of said instruments. 5. The combination with a viscosimeter oi": an instrument responsive to the variations of the temperature of a liquid under test; and mechanism operatively associated with the viscosimeter and said instrument for plot ting the curve showing the variation of the viscosity of such liquid under varying temperature conditions. V

6. The combination of a rotary member; a viscosimeterhaving one of its elements connected to deflect said member through an angle dependent upon the viscosity of the liquid under test; and an instrument responsive to changes in the temperature of such liquid including an element mounted to cooperate with the rotary member to make a record of" the viscosity of said liquid at any temperature.

In both of llil 7. The combination of a viscosimeter hav-' ing a rotary driving member; a record drum; a liquid containing cup; and a struct'uremoun-ted thereon, of which the drum is connected to .Lone of the two elements comprised by the vstructure and the cup, and the driving member is connected to the other; with an-instrument responsive to changes of temperature of the liquid in the cup and driving member is connected .to the other; a

liquid bath surrounding said cup; with an instrument responsive to changes of temperature of the liquid of said bath and mounted to cooperate with said drum to form a record.

9. The combination of a liquid container a cup 'rotatably mounted therein; means for j driving said pup; a body extending into the cup in posit1on tobe acted on by a body of liquid rotating with the .cup; a structrue for supporting a record and connected to be deflected by said body; with means cooperating with said record supporting member to indicate the temperature corresponding to the viscosity of the liquid in the cup. r r

10. The combination of arotary cup containing liquid to be tested; an elementmounted in the cup in position to vbe deflected-by said liquid; a structure connected to said element for supporting a record; and means for indicatin on such record the viseosity correspondin to any particular 1 temperature of the liquid under test.

The combination of a liquid container; arotary cup-"extending into the same and, holding liquid whose viscosity is to be tested; a body rotatably mounted in said cup; a structure for supporting a record 'coacting' with the record sheet to in cats at.

' responsive deyice having a te'm rature of'the liquid in t e,cup and insaid 13. The combination of a supporting sheet'and connected to be deflected by said body; with a thermometric device extend ing into the container and includi 7 means any temperature the viscosity of the liquid i'n'fthe cup.

12. The combination ofa rotary cup con.-

tainin liquid o betested; a body rotatably mounted m'said cup; a record drum'connected to said, body; with a temperaturertion atthe clu' ing a member formaking a record on structure; a' rotary cup containing liqui whose viscosity is to be tested; a body sus-' pended from said structure and extending I into said cup; a tube substantially coaxial with the axis of rotation of said body; a drum fixed to said tube; and means for making on said drum a record of the vis cosity, at any given temperature, of the liquid in the cup.

14. The combination in a'viscosimeter of a rotary container for liquid to be tested; a supporting-structure; a torsion element attached to said structure; a body mounted in saidrontaine'r. and having the torsion element connected to itadjacent its lower end; and means for indicating the viscosity of the liquid in the contai r when the latter is turned at a definite s geed, the same including a rotary drum and a temperature responsive device including a pencil operative on said drum.

15. The combination of a supporting structure; a rotary container for liquid to be tested; a torsion element hung from said structure; a body mounted coaxially within the container and having said torsion element connected toits lower portion; a tube fixed to said body and extending therefrom around said torsion element, a second tube concentric with the first tube and also attached to said body; a drum carried by the second tube; and means for making on said drum a record of the viscosity of a liquid in the container under predetermined tomperature conditions.

16. The combination of a relatively fixed container; a second container holding liquid to be tested and rotatably -mounted in said fixed container; a body suspended within the second container; a device responsive to changes of temperature of the liquid in said container; with mechanism for causing said body and device to cooperate to make a joint record of the indication of said instrument and of the deflection of said suspended body when the second container is rotated. r

17. The combination of a viscosimeter includin a rotary structure; means for drivdetermined speed.

I coiiperate to make a ]0lIlt record of the the in i said 18. The combination of a supporting I structure; a container mounted thereon; a

shaft extending through the bottom of said container; a cup carried by said shaft and holding, liquid tobe tested; means for rotating the, shaft and on a rotatable mounted body extending into t e cup; a thermometric device responsive to changes of temperature in'saidcontainer; and two elements mounted 18 to cooperate to simultaneously record the indication of said device and the deflection of said body when the cup is rotated.

19. The combination of a sup orting structure; a liquid container mounte thereon; a tubular shaft extending vertically through the bottom of said container and terminating in a cup holding liquid t0,be tested; a valve for controlling the flow of liquid through said tubular shaft; means for driving said shaft; a stuffing box for preventing leakage between the container and said shaft; means for rotatably suspending a body in said cup; and means for indicating the viscosity of the liquid in the cup when the latter is driven at a predetermined speed.

20. The combination in a viscosimeter of a supporting structure; a rotary cup for liquid to be tested; a torsion element hung from said supporting structure; a body in the cup having said torsion element extended conditions of use is proportional to the viscosity of a liquid under test; with a thermometric device exposed to the temperature of said liquid and including a movable element coacting with said member of the viscosimeter to form a record.

22. The combination of a viscosimeter inditions of use is proportional to the viscosity of a liquid under test; with a thermometric device exposed to the temperature eluding a drum whose deflection under conof said liquid and including a stylus coact- 40 ing with said drum to form a record.

HARVEY e. HAYES. GEORGE W. LEWIS. 

